Darmadi (born 1945; as Wong Pek Sen; Chinese: 黄培森) is an Indonesian badminton player from the 60s to 70s.

He managed to bring home two medals; a silver in the men's singles[1] and bronze in the mixed doubles.

[2] He and with the men's team also succeeded in bringing Indonesia to conquer Malaysia in the third 1969 Asian Badminton Championships in the Philippines for the first time.

[3] He also played in the men's doubles with partner Ang Tjin Siang (later known as Muljadi) and won the French Open in 1966.

[4] Partnered with Minarni in the mixed doubles, they won 1967 Singapore and Canada Opens.